He turned off the car and touched the garage door opener above him, whistling as he waited.
The boom of the garage door opener occupies the space shown in blue.
Your house will not be "smart" insofar as it will not seem alive to you any more than your garage door opener or your web browser does.
Likewise, garage door opener motors are also very heavy.
The carriage of the garage door slips into the track and moves back and forth along the track when the garage door opener motor is operated.